If I remember right, these type of amps were designed so you could plug ANYTHING into them. That's why they have Lo-Z and Hi-Z inputs. Just a an amplifier. It amplifies whatever you put into it. Turn them up and you get natural compression.

Tried it out today, mic with adaptor to jack works OK, guitar works OK, both on the high Z input. It started to cut out after a while, don't know if it's down to controls being "sleepy" after a prolonged inactivity or a fault inside or the cab being the wrong impedance. It has 2 x 8 ohm Celestions in parallel, that shouldn't be a problem, should it?

Tone: good, clean and big. The increase in volume on the guitar knob is quite steep, where I'd use 3 for rhythm/1 for solo on the Phoenix, it needs to be at 2 or slightly less because when you go from 3 to 1, windows fall out and the airport rings up to complain. The reverb is quite effective too, you can do really good maniacal laughter with it wound up full.

Not bad for a thing that was being abandoned if I didn't take it under my wing.

Well, it's been used a few times and it's actually quite a useful bit of kit, we do the community music thing, and we immediately double the number of guitar inputs if it's a busy night.

Also, one of the kids is a metal head, been using one of the Marshall solid states, ran through the Carlsbro head tonight and Big John's Marshall 4 x 10 cab and loves the fact that it neither adds character or takes it away from his Silly Pedal.